The FY-90QPRO controller is specially designed for QuatroCopter use. The Attitude Flight Stabilization System (AFSS), which is the heart of the FY-90QPRO, is an integrated 3-axis gyroscope and 3-axis accelerometer. AFSS forms a comprehensive inertial based navigation platform that calculates 3D flight attitude using proprietary FeiYu Tech algorithm. When in Full Balanced-Mode (Mode 1), the AFSS detects any changes to the model's horizontal attitude. If attitude change is detected, the unit will send out controlling signals to change the Quad's four motor speed to maintain stability and balance. The FY-90QPRO supports two Flight Modes. Selection of Flight Modes is via a free channel on your Receiver: -Mode 1: Full Balance Mode: in this mode, the Quad flight is fully stabilized on all 3 axis, resulting in extremely leveled flight. Suitable for aerial photography, videography, FPV and beginner quad pilots. -Mode 2: Aerobatics Mode: In this flight mode, the controls to the Quad motors are very responsive. Specifically for skilled Quad pilots for sports flying, fast forward flights (FFF), stunts, etc. FY-90QPRO system is extremely easy to set up. The Quick Start Guide (below) is good enough to get the system flying. Relaxing and easy Quad flying is here at last !! Attention !! If you are a new to the hobby and have never flown a QuatroCopter before, we do not recommend you install this device on your own.

Specifications:                                                                      Instructiuni
Input voltage: 4.0 to 6.0 Volts
Weight (excluding wires): 20 g
Current draw: 52 mA (5V)
Size: 55 x 33 x 20 mm
The FY-90QPRO supports two flight formats, "Cross" and "X"

Remote Control system requirement:
The FY-90QPRO has been tested to work with the following RC systems:
• Robbe-Futaba PPM/ PCM 1024/ PCM G3 mode/ 2.4 GHz systems
• Graupner JR PPM 8/ PPM 12/ SPCM mode
• MULTIPLEX PPM8, PPM 12 with UNI mode
• Any remote control system using the standard of 1.5 ms neutral position.

Includes:
1 x FY-90Q PRO circuit board
1 x Receiver connecting wires
2 x Double-sided tape or velcro fasteners
1 x Shock absorbing platform with 4 damper bands pre-installed
1 x Instruction manual